I'm new to sharecg but when I tried to sign up, it said my name and email are already in use. I'm a member of Daz and Renderosity - could that be the reason or do you think somebody else is using my ID?

No, this is the username I wanted but the screen told me it was already taken then I was allowed to login without needing an email confirmation. If nobody has posted here under this username then I guess everything is OK. It was probably some kind of temporary glitch in the matrix.